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Custom mylar bags · Material guide

Mylar bag thickness explained: 3 to 6 mil.

Mylar bag thickness is measured in mil, one thousandth of an inch. On TWO Packaging’s order page you choose it yourself, from 3 mil (0.076 mm) to 6 mil (0.152 mm), for every material.

Updated October 6, 2026 · By the TWO Packaging team

A bright silver foil stand-up mylar pouch

Order custom mylar bags online: any size from 500 bags, $535.34 delivered for 500 4″ × 6″ stand-up pouches, your art placed on your dieline and an instant 3D proof.

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Mil to millimetres

ThicknessMillimetresHow it feels
3 mil0.076 mmSturdy and flexible: the everyday choice for most retail pouches
4 mil0.102 mmNoticeably more substantial in the hand
5 mil0.127 mmThick and firm; holds its shape on a shelf
6 mil0.152 mmOur heaviest gauge, for large and heavy fills

Holographic film also comes in half-mil steps from 3 to 5 mil.

How to choose

  • Most products: 3 or 4 mil.
  • Heavier fills and larger bags: 5 or 6 mil, so the bag stands tall and feels premium.
  • A premium feel: one step thicker than you need, paired with a soft-touch finish.

Price

A thicker film uses more material and weighs a little more, so each step up adds a small amount to your delivered price. The order page shows it for your exact bag the moment you choose a thickness.

Frequently asked questions

What does mil mean on a mylar bag?

A mil is one thousandth of an inch, or 0.0254 mm. A 3 mil bag is 0.076 mm thick and a 5 mil bag is 0.127 mm thick.

What thickness should my mylar bag be?

3 or 4 mil suits most products. Choose 5 or 6 mil for heavy fills, large bags or a firmer, more premium feel.

Can I choose the thickness of my custom mylar bags?

Yes. On TWO Packaging’s order page you choose 3 to 6 mil for every material, and the price updates instantly.